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Finding the Fourth Proportional to 120.22, 166.62 and 118.06

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Solution

The fourth proportional to 120.22, 166.62 and 118.06 is: 163.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.22 : 166.62 = 118.06 : x
  2. Step 2: Convert to fraction form
    120.22/166.62 = 118.06/x
  3. Step 3: Cross multiply
    120.22x = 166.62 × 118.06
  4. Step 4: Simplify right side
    120.22x = 19,671.16
  5. Step 5: Solve for x
    x = 19,671.16/120.22
  6. Step 6: Final answer
    x = 163.63

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.